INFO: task khugepaged:907 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. khugepaged D21376 907 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xaa/0x130 kernel/locking/rwsem.c:72 collapse_huge_page+0x2b9/0x2140 mm/khugepaged.c:1006 khugepaged_scan_pmd mm/khugepaged.c:1215 [inline] khugepaged_scan_mm_slot+0x2096/0x3200 mm/khugepaged.c:1701 khugepaged_do_scan mm/khugepaged.c:1782 [inline] khugepaged+0x9aa/0xce0 mm/khugepaged.c:1827 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 INFO: task syz-fuzzer:4461 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-fuzzer D19312 4461 4455 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125 do_page_mkwrite+0x14e/0x520 mm/memory.c:2374 wp_page_shared mm/memory.c:2670 [inline] do_wp_page+0xf5c/0x1670 mm/memory.c:2770 handle_pte_fault mm/memory.c:3983 [inline] __handle_mm_fault+0x2abf/0x44a0 mm/memory.c:4091 handle_mm_fault+0x53e/0xc80 mm/memory.c:4128 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x70b5e1 Code: Bad RIP value. RSP: 002b:000000c42aef4f48 EFLAGS: 00010212 RAX: 000000c42aef5288 RBX: 000000c42aef5290 RCX: 00007f79b2955000 RDX: 0000000000000745 RSI: 0000000000000000 RDI: 0000000000000980 RBP: 000000c42aef4f58 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000095bb32 R11: 0000000000000004 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000013 R15: 000000c42aef53f8 percpu_rw_semaphore(000000006c4d0e37) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor0:4481 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D18944 4481 4473 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffcd0792028 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffcd0792030 RSI: 00007ffcd07920c0 RDI: 00007ffcd07920c0 RBP: 00007ffcd0793dd0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001b4b940 R13: 0000000000000000 R14: 00007ffcd07937a0 R15: 0000000000702140 percpu_rw_semaphore(0000000029705f3c) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor1:4484 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D21352 4484 4474 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffda36b1d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffda36b1d30 RSI: 00007ffda36b1dc0 RDI: 00007ffda36b1dc0 RBP: 00007ffda36b3ad0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001b21940 R13: 0000000000000000 R14: 00007ffda36b34a0 R15: 0000000000702140 percpu_rw_semaphore(0000000029705f3c) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor5:4485 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D21232 4485 4479 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007fffcc292418 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007fffcc292420 RSI: 00007fffcc2924b0 RDI: 00007fffcc2924b0 RBP: 00007fffcc2941c0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 0000000002767940 R13: 0000000000000000 R14: 00007fffcc293b90 R15: 0000000000702140 percpu_rw_semaphore(0000000029705f3c) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor6:4487 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D21232 4487 4478 0x00000000 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffdf634fcf8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffdf634fd00 RSI: 00007ffdf634fd90 RDI: 00007ffdf634fd90 RBP: 00007ffdf6351aa0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001c04940 R13: 0000000000000000 R14: 00007ffdf6351470 R15: 0000000000702140 percpu_rw_semaphore(0000000029705f3c) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor7:23653 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D23432 23653 4488 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125 do_page_mkwrite+0x14e/0x520 mm/memory.c:2374 wp_page_shared mm/memory.c:2670 [inline] do_wp_page+0xf5c/0x1670 mm/memory.c:2770 handle_pte_fault mm/memory.c:3983 [inline] __handle_mm_fault+0x2abf/0x44a0 mm/memory.c:4091 handle_mm_fault+0x53e/0xc80 mm/memory.c:4128 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x4084b0 Code: 00 00 2e 23 40 00 00 00 00 00 3e 23 40 00 00 00 00 00 4e 23 40 00 00 00 00 00 5e 23 40 00 00 00 00 00 6e 23 40 00 00 00 00 00 <7e> 23 40 00 00 00 00 00 8e 23 40 00 00 00 00 00 9e 23 40 00 00 00 RSP: 002b:00007ffe70419f40 EFLAGS: 00010287 RAX: 0000001b2bc26228 RBX: 0000000000000000 RCX: 0000001b2cc20000 RDX: 0000001b2bc2622c RSI: 00000000007303d8 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffe70419f80 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0 percpu_rw_semaphore(000000006c4d0e37) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor2:23684 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D24904 23684 4483 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125 do_page_mkwrite+0x14e/0x520 mm/memory.c:2374 wp_page_shared mm/memory.c:2670 [inline] do_wp_page+0xf5c/0x1670 mm/memory.c:2770 handle_pte_fault mm/memory.c:3983 [inline] __handle_mm_fault+0x2abf/0x44a0 mm/memory.c:4091 handle_mm_fault+0x53e/0xc80 mm/memory.c:4128 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x4084b0 Code: 00 00 2e 23 40 00 00 00 00 00 3e 23 40 00 00 00 00 00 4e 23 40 00 00 00 00 00 5e 23 40 00 00 00 00 00 6e 23 40 00 00 00 00 00 <7e> 23 40 00 00 00 00 00 8e 23 40 00 00 00 00 00 9e 23 40 00 00 00 RSP: 002b:00007fff5d45e640 EFLAGS: 00010283 RAX: 0000001b337234c8 RBX: 0000000000000000 RCX: 0000001b34720000 RDX: 0000001b337234cc RSI: 00000000007319a8 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff5d45e680 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0 percpu_rw_semaphore(000000006c4d0e37) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor3:23687 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D24904 23687 4482 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6125 do_page_mkwrite+0x14e/0x520 mm/memory.c:2374 wp_page_shared mm/memory.c:2670 [inline] do_wp_page+0xf5c/0x1670 mm/memory.c:2770 handle_pte_fault mm/memory.c:3983 [inline] __handle_mm_fault+0x2abf/0x44a0 mm/memory.c:4091 handle_mm_fault+0x53e/0xc80 mm/memory.c:4128 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x4084b0 Code: 00 00 2e 23 40 00 00 00 00 00 3e 23 40 00 00 00 00 00 4e 23 40 00 00 00 00 00 5e 23 40 00 00 00 00 00 6e 23 40 00 00 00 00 00 <7e> 23 40 00 00 00 00 00 8e 23 40 00 00 00 00 00 9e 23 40 00 00 00 RSP: 002b:00007ffef73ab780 EFLAGS: 00010283 RAX: 0000001b338216a4 RBX: 0000000000000000 RCX: 0000001b34820000 RDX: 0000001b338216a8 RSI: 00000000007301b0 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffef73ab7c0 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000002 R14: 000000000072bea0 R15: 000000000072bea0 percpu_rw_semaphore(000000006c4d0e37) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: task syz-executor4:23695 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180711+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D26568 23695 4486 0x00000004 Call Trace: context_switch kernel/sched/core.c:2853 [inline] __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501 schedule+0xfb/0x450 kernel/sched/core.c:3545 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] __percpu_down_read+0x1a0/0x290 kernel/locking/percpu-rwsem.c:86 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x2d7/0x300 fs/super.c:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 filename_create+0x13e/0x5b0 fs/namei.c:3671 user_path_create fs/namei.c:3734 [inline] do_symlinkat+0xfe/0x2d0 fs/namei.c:4188 __do_sys_symlink fs/namei.c:4214 [inline] __se_sys_symlink fs/namei.c:4212 [inline] __x64_sys_symlink+0x59/0x80 fs/namei.c:4212 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b57 Code: Bad RIP value. RSP: 002b:00007ffe23373898 EFLAGS: 00000217 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000455b57 RDX: 0000000000000000 RSI: 00000000004bb371 RDI: 00007ffe23374590 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000b44940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffe23373f40 R15: 00000000007034c0 percpu_rw_semaphore(0000000029705f3c) ->rw_sem.count=0xfffffffe00000001 ->rss.gp_state=2 ->rss.gp_count=1 ->rss.cb_state=0 ->rss.gp_type=1 ->readers_block=1 ->read_count=0 ->list_empty(rw_sem.wait_list)=0 ->writer.task= (null) INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 899 Comm: khungtaskd Not tainted 4.18.0-rc4-next-20180711+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:231 [inline] watchdog+0xb81/0x10f0 kernel/hung_task.c:292 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.006 msecs NMI backtrace for cpu 0 CPU: 0 PID: 4463 Comm: syz-fuzzer Not tainted 4.18.0-rc4-next-20180711+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x1/0x20 kernel/kcov.c:194 Code: ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 e8 6a fe ff ff 5d c3 0f 1f 84 00 00 00 00 00 55 <48> 89 f2 48 89 fe bf 07 00 00 00 48 89 e5 48 8b 4d 08 e8 48 fe ff RSP: 0018:ffff8801accdef18 EFLAGS: 00000246 RAX: ffff8801accdf7d0 RBX: 0000000002313ba8 RCX: 0000000000000000 RDX: 1ffff1003599befc RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8801accdf568 R08: ffff8801accdf6d8 R09: ffff8801accdf718 R10: ffffed003599beea R11: ffff8801accdf757 R12: 0000000000000001 R13: 0000000000000ba8 R14: 0000000000000000 R15: ffff8801accdf540 FS: 000000c420086e68(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000170c158 CR3: 00000001c04d2000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: futex_wait_setup+0xd9/0x410 kernel/futex.c:2577 futex_wait+0x418/0xa20 kernel/futex.c:2640 do_futex+0x336/0x27d0 kernel/futex.c:3527 __do_sys_futex kernel/futex.c:3587 [inline] __se_sys_futex kernel/futex.c:3555 [inline] __x64_sys_futex+0x472/0x6a0 kernel/futex.c:3555 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45ddf3 Code: cc cc cc cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14 4c 8b 54 24 18 4c 8b 44 24 20 44 8b 4c 24 28 b8 ca 00 00 00 0f 05 <89> 44 24 30 c3 cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 RSP: 002b:000000c420153ea8 EFLAGS: 00000206 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00000000000186a0 RCX: 000000000045ddf3 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000002313ba8 RBP: 000000c420153ef0 R08: 0000000000000000 R09: 0000000000000000 R10: 000000c420153ee0 R11: 0000000000000206 R12: 000000c42afcb298 R13: 000000000000001f R14: 0000000000c1bdc0 R15: ffffffffffffbdc6